@article{PIM_1982_N_S_31_45_a12,
     author = {Ekkehard Kr\"atzel},
     title = {Die {Wertevertailung} {Der} {Anzahl} {Der} {Nicht-Isomorphen} {Abelschen} {Gruppen} {Endlicher} {Ordnung} {Und} {Ein} {Verwandtes} {Zahlenteoretisches} {Problem}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {93 },
     publisher = {mathdoc},
     volume = {_N_S_31},
     number = {45},
     year = {1982},
     url = {http://geodesic.mathdoc.fr/item/PIM_1982_N_S_31_45_a12/}
}